<?php

/*
 * Copyright 2008 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#namespace tehframework\orm\annotations\relations;

#use \InvalidArgumentException;
#use \ezcPersistentObjectDefinition;
#use \ezcPersistentObjectIdProperty;
#use \ezcPersistentOneToOneRelation;
#use \ezcPersistentSingleTableMap;
#use tehframework\orm\annotations\RelationAnnotation;

class OneToOneAnnotation extends RelationAnnotation
{
	/**
	 * @var bool
	 */
	protected $cascade = false;
	
	/**
	 * @param  bool $cascade
	 * @return OneToOneAnnotation
	 */
	public function setCascade($cascade)
	{
		$this->cascade = (bool)$cascade;
		
		return $this;
	}
	
	/**
	 * @param  ezcPersistentObjectDefinition $def
	 * @param  array<string,ezcPersistentObjectDefinition> $defs
	 * @return ezcPersistentOneToOneRelation
	 * @throws InvalidArgumentException
	 */
	protected function createRelation(
		ezcPersistentObjectDefinition $def, array $defs)
	{
		$rel = new ezcPersistentOneToOneRelation(
			$this->createSourceTable($def), $this->createDestinationTable($defs)
		);
		
		$rel->columnMap = $this->createColumnMap($def, $defs);
		$rel->cascade   = $this->cascade;
		$rel->reverse   = $this->reverse;
		
		return $rel;
	}
	
	/**
	 * @param  ezcPersistentObjectDefinition $def
	 * @param  array<string,ezcPersistentObjectDefinition> $defs
	 * @return ezcPersistentSingleTableMap[]
	 * @throws InvalidArgumentException
	 */
	protected function createColumnMap(
		ezcPersistentObjectDefinition $def, array $defs)
	{
		if ($this->entity !== null)
		{
			return array($this->createEntityColumnMap($def, $defs));
		}
		
		if (isset($this->columnMap[0]))
		{
			if (is_array($this->columnMap[0]))
			{
				return $this->createMultipleColumnMaps();
			}
			
			if (isset($this->columnMap[1]))
			{
				return $this->createSingleColumnMap();
			}
		}
		
		throw new InvalidArgumentException(
			'Colum map can not be empty or invalid, if entity is not specified.'
		);
	}
	
	/**
	 * @param  ezcPersistentObjectDefinition $def
	 * @param  array<string,ezcPersistentObjectDefinition> $defs
	 * @return ezcPersistentSingleTableMap[]
	 */
	protected function createEntityColumnMap(
		ezcPersistentObjectDefinition $def, array $defs)
	{
		return new ezcPersistentSingleTableMap(
			$def->idProperty->columnName,
			$this->createDestinationColumn($defs[$this->entity])
		);
	}
	
	/**
	 * @return ezcPersistentSingleTableMap[]
	 */
	protected function createMultipleColumnMaps()
	{
		$columnMaps = array();
		
		foreach ($this->columnMap as $columnMap)
		{
			if (!isset($columnMap[0]) || !isset($columnMap[1]))
			{
				continue;
			}
			
			$columnMap[] = new ezcPersistentSingleTableMap(
				$columnMap[0], $columnMap[1]
			);
		}
		
		return $columnMap;
	}
	
	/**
	 * @return ezcPersistentSingleTableMap
	 */
	protected function createSingleColumnMap()
	{
		return array(new ezcPersistentSingleTableMap(
			$this->columnMap[0], $this->columnMap[1]
		));
	}
}